spring mvc集成websocket

1、要求

spring框架版本4.0以上

2、添加jar包

核心包

spring-websocket-4.1.4.RELEASE.jar

spring-messaging-4.1.4.RELEASE.jar

依赖包（如果项目已添加，则不用重复添加）

spring-beans-4.1.4.RELEASE.jar

spring-context-4.1.4.RELEASE.jar

spring-core-4.1.4.RELEASE.jar

spring-web-4.1.4.RELEASE.jar

或者在maven的pom.xml中加入websocket所依赖的jar包

<dependency>  
   <groupId>org.springframework</groupId>  
   <artifactId>spring-websocket</artifactId>  
   <version>4.0.1.RELEASE</version>  
</dependency>  
<dependency>  
   <groupId>org.springframework</groupId>  
   <artifactId>spring-messaging</artifactId>  
   <version>4.0.1.RELEASE</version>  
</dependency>

3、创建握手类

package org.kent.socket.interceptor;

import java.util.Map;

import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;

public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor {

	@Override
	public boolean beforeHandshake(ServerHttpRequest request,
			ServerHttpResponse response, WebSocketHandler wsHandler,
			Map<String, Object> attributes) throws Exception {

		return super.beforeHandshake(request, response, wsHandler, attributes);
	}

	@Override
	public void afterHandshake(ServerHttpRequest request,
			ServerHttpResponse response, WebSocketHandler wsHandler,
			Exception ex) {
		
		super.afterHandshake(request, response, wsHandler, ex);
	}
	
}

4、创建处理类

package org.kent.socket.handler;

import org.springframework.web.socket.TextMessage;  
import org.springframework.web.socket.WebSocketSession;  
import org.springframework.web.socket.handler.TextWebSocketHandler;  

@Component
public class WebsocketEndPoint extends TextWebSocketHandler {  
  
    @Override  
    protected void handleTextMessage(WebSocketSession session,  
            TextMessage message) throws Exception {  
        super.handleTextMessage(session, message);  
        TextMessage returnMessage = new TextMessage(message.getPayload()+" hello world!");  
        session.sendMessage(returnMessage);  
    }  
}

5、处理类和握手协议的spring配置(applicationContext.xml文件）

<websocket:handlers>  
    <websocket:mapping path="/sockets/websocketEndPoint" handler="websocketEndPoint"/>  
    <websocket:handshake-interceptors>  
    <bean class="org.kent.socket.HandshakeInterceptor"/>  
    </websocket:handshake-interceptors>  
</websocket:handlers>